The Jolly Balloon Man | Ertha Jo, Frontier Mentor | Pestermite

Cards

Activate a mana-producing creature by tapping it, adding at least ({1} magic symbol) .
Activate
The Jolly Balloon Man by paying ({1} magic symbol) and tapping it, targeting the mana-producing creature.
Ertha Jo triggers, copying
The Jolly Balloon Man's ability, targeting
Pestermite.
Resolve the copy of
The Jolly Balloon Man's ability, creating a token copy of
Pestermite that is a 1/1 Balloon with haste.
When
Pestermite enters the battlefield, it triggers, untapping
The Jolly Balloon Man.
Resolve the
Jolly Ballon Man ability from step 2, creating a token copy of the mana-producing creature that is a 1/1 Balloon with haste.
Activate the mana-producing creature token by tapping it, adding at least ({1} magic symbol) .
Repeat from step 2.